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\begin{document}


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% Text Node
\draw (298,132.06) node   {$f\displaystyle \left(\mathbf{x} , \theta^*\right)$};
% Text Node
\draw (132.5,224) node   {$\left\{x^{( i)} ,y^{( i)}\right\}^{N}_{i=1}$};
% Text Node
\draw (487,130.5) node   {$y$};
% Text Node
\draw (497.5,131) node  [align=left] {{\small 或}};
% Text Node
\draw (523.5,129.5) node   {$p( y|\mathbf{x})$};
% Text Node
\draw (120,130) node   {$\mathbf{x}$};
% Text Node
\draw (300,221.94) node   {$\mathcal{A}$};
% Text Node
\draw (123,149) node  [align=left] {{\footnotesize 输入}};
% Text Node
\draw (126,253.5) node  [align=left] {{\footnotesize 训练样本集合}};
% Text Node
\draw (326,248.5) node  [align=left] {{\footnotesize 学习算法}};
% Text Node
\draw (336,157.5) node  [align=left] {{\footnotesize 模型}};
% Text Node
\draw (524,150.5) node  [align=left] {{\footnotesize 输出}};


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